Clock setting mechanism



J1me 1934- F. c. CARROLL CLOCK SETTING MECHANISM 2 Sheets-Sheet 1 Filed July 11, 1933 Jill ll I-IIIIIIIII IN VE N 01? v fia/z/r C. arm/l B Y a A TTORNEY June 26, 1934. (l'CARROLL 1,964,379

CLOCK SETTING MECHANISM Filed July 11, 1933 2 Sheets-Sheet 2 INVENTOR A TTORNEY Patented June 26, 1934 UNITED STATES PATENT OFFICE 2 Claims.

My invention relates to a setting device which will act to set a clock or to automatically set a pair or a series of connected clocks simultaneously when one is set.

One object is to eliminate the time and necessity for setting each clock individually.

Another object is to provide two or more clocks for advertising or display purposes, one of which may be placed on top of a building and the other inside, and may be of difierent sizes but electrically connected.

If the clocks stop because of current failure, the inside clock is set at the correct time with the setting device which automatically sets the outside clock or clocks.

If an outside clock should stop and the inside clock continue, all that is necessary is to ascertain the time at which the outside clock stopped, throw the switch, disconnecting the outside clock and set the inside clock by means of the setting device, to the same time as that at which the outside clock stopped, close the switch and set the clocks to the correct time by the use of the setting device.

Various other features of my invention will be apparent from the following specification and its accompanying illustrations, in which:

Fig. 1 is a perspective view of a gasoline filling station with one clock mounted outside.

Fig. 2 is a diagrammatic view of a dual clock setting mechanism and wiring diagram.

Fig. 3 is a diagrammatic view of the dual clocks, switch, and setting buttons.

Fig. 4 is a fragmentary side elevation of the magnet shaft, dog and setting gear.

Referring to the drawings:-a building is indicated at 10 upon which is mounted by suitable means, a larger clock unit 11 of the dual clock system.

A smaller clock unit 12 mounted on a wall within the building 10 is the clock unit by which the other clock units are set.

Mounted on the back of the works casing 13 and attached to hands-setting gear shaft 14 is a setting gear or ratchet 15 which turns clockwise with the action of the dog or pawl 16 as it rocks on pivot pin 17 projecting from a lever arm 32 fulcrumed on the shaft 14.

Either button 18 attached to a desk 19 or the like, when pressed closes an electric circuit between the magnets 20 which are set in parallel for each unit of the dual clock. This causes the magnet core or rod 21 in each clock unit to move upward simultaneously through magnet sleeve 22, said magnet core 21 projecting through a cylindrical arm 23 which is retained on the magnet core by a stop 24 and nut 25 on said core 21. A pair of locking nuts 26 and 27 retain the magnet sleeve in an upright position upon the bracket or flanged plate 28. The dog 16 has 0 at one end a lug 29 pivotally retained within the end of the cylindrical arm 23 as shown in Fig. 4.

In operation, pressing either button 18 closes the circuit through the magnets 20 when the switch on the opposite line or parallel is closed. This causes the core 21 to move upward through the sleeve 22 pivoting the dog 16 until it contacts the setting gear and moving the gear clock-- wise at each pressure of the button; when the button is released the core drops. The hands 7 may be set to move intervals or spaces of one, two, five or any number of minutes desired. Stop 31 on movable arm 32 mounted rotatably on hands setting shaft 14 limits the pivoting movement of dog 16. 7

In the event that the large outside clock unit 11 stops and the inside clock unit 12 does not,

a switch 30 is opened disconnecting the clock unit 11; the clock unit 12 is then set at the hour at which clock unit 11 stopped, switch 30 is then closed again connecting the units of the dual clock, and. the above procedure for setting completes the setting operation. It is possible to set any number of clocks in the same manner.

I claim:

1. The combination with an electric clock, of a hand setting mechanism for the clock, comprising a separate circuit independent of the driving circuit of the clock, an electro-magnet in the said separate circuit, a manually operated switch in the said separate circuit, and means actuated by the magnet and independent of the driving mechanism of the clock to set the hands of the clock by a step by step movement.

2. The combination with a clock, of a hand setting mechanism independent of the driving mechanism of the clock, comprising a setting shaft, a gear thereon, a lever arm, a pawl pivoted to the lever arm and arranged to engage the gear, an electro-magnet and its circuit, a manually operated switch in the circuit, and a reciprocating magnet-core connected to the lever arm and adapted to actuate the pawl and gear step-by-step as the magnet is energized.

FRANK c. CARROLL. 

